Generac Portable Products 2400PSI User manual

High Pressure Washer Owner’s Manual
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Obey all safety messages that follow this symbol to avoid possible injury or death.
2400PSI
Model No. 1537-0 (2,400 PSI High Pressure Washer) Manual No. 187699 Revision 1 (12/14/2000)
Visit our Generac website: www.generac-portables.com
Problems?
Questions?
Before taking your unit
back to the store,
call the pressure washer
helpline at
1-800-270-1408
M-F 8-5 CT

Generac Portable Products 2,400 PSI High Pressure Washer
2
EQUIPMENT
DESCRIPTION
CONGRATULATIONS on your purchase of a
GENERAC high pressure washer. It has been designed,
engineered and manufactured to give you the best possible
dependability and performance.
This manual contains information for a high pressure
washer that operates at 2,400 PSI at a flow rate of
2.2 gallons per minute. This high quality residential system
features 10” wheels, axial cam pump with stainless steel
pistons, automatic cool down system, chemical injection
system, adjustable spray nozzle. Includes safety goggles,
heavy duty 25’ hose, and more.
Please read and retain this manual. The instructions will
enable you to assemble your unit without tools, and
maintain your high pressure washer properly.
Every effort has been made to ensure that the information
in this manual is both accurate and current. However,
Generac reserves the right to change, alter or otherwise
improve the product and its documentation at any time
without prior notice.
Should you experience any problem you cannot easily
remedy, call the pressure washer helpline at
1-800-270-1408.
CUSTOMER
RESPONSIBILITIES
• Read and observe the safety rules.
• Follow regular schedule in maintaining, caring for and
using your high pressure washer.
• For off-season storage, review “Preparing the Unit for
Storage” on page 14.
SAFETY RULES
CAUTION! When setting up, transporting,
adjusting or making repairs to your high pressure
washer, always disconnect the spark plug wire from
the spark plug and place the wire where it cannot
contact spark plug.
DANGER! Engine exhaust gases contain DEADLY
carbon monoxide gas. This dangerous gas, if
breathed in sufficient concentrations, can cause
unconsciousness or even death. Operate this
equipment only in the open air where adequate
ventilation is available.
DANGER! Gasoline is highly FLAMMABLE and its
vapors are EXPLOSIVE. Do Not permit smoking,
open flames, sparks or heat in the vicinity while
handling gasoline. Avoid spilling gasoline on a hot
engine. Allow unit to cool for 2 minutes before
refueling. Comply with all laws regulating storage
and handling of gasoline.
Read this manual carefully and become familiar
with your pressure washer. Know its applications,
its limitations, and any hazards involved.
• Locate this pressure washer in areas away from
combustible materials, combustible fumes or dust.
• The high pressure equipment is designed to be used with
Generac authorized parts only. If you use this equipment
with parts that do not comply with minimum
specifications, the user assumes all risks and liabilities.
• Some chemicals or detergents may be harmful if inhaled
or ingested, causing severe nausea, fainting or poisoning.
The harmful elements may cause property damage or
severe injury.
•Do Not allow CHILDREN to operate the pressure
washer at any time.
The engine exhaust from this product
contains chemicals known to the State
of California to cause cancer, birth
defects, or other reproductive harm.
WARNING:

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• Operate engine only at governed speed. Running the
engine at excessive speeds increases the hazard of
personal injury. Do Not tamper with parts which may
increase or decrease the governed speed.
•Do Not wear loose clothing, jewelry or anything that
may be caught in the starter or other rotating parts.
• Before starting the pressure washer in cold weather,
check all parts of the equipment and be sure ice has not
formed there.
•Never use a spray gun which does not have a trigger lock
or trigger guard in place and in working order.
• Keep the hose connected to machine or the spray gun
while the system is pressurized. Disconnecting the hose
while the unit is pressurized is dangerous.
•Never operate units with broken or missing parts, or
without protective housing or covers.
• Operate and store this unit on a stable surface.
• Check the fuel system for leaks or signs of deterioration,
such as chafed or spongy hose, loose or missing clamps,
or damaged tank or cap. Correct all defects before
operating the pressure washer.
•Do Not spray flammable liquids.
•Do Not secure the spray gun in the open position.
• Use a respirator or mask whenever there is a chance
that vapors may be inhaled. Read all instructions with
mask so you are certain the mask will provide the
necessary protection against inhaling harmful vapors.
•Never aim the spray gun at people, animals or plants.
The high pressure stream of water that this equipment
produces can pierce skin and its underlying tissues,
leading to serious injury and possible amputation.
•Never allow any part of the body to come in contact
with the fluid stream. Do Not come in contact with a
fluid stream created by a leak in the high pressure hose.
• Always wear eye protection when you use this
equipment or when you are in the vicinity where the
equipment is in use.
• High pressure spray can cause paint chips or other
particles to become airborne.
•Do Not operate the pressure washer above the rated
pressure.
•Never move the machine by pulling on the high pressure
hose. Use the handle provided on the unit.
• Always be certain the spray gun, nozzles and accessories
are correctly attached.
• High pressure spray may damage fragile items including
glass. Do Not point spray gun at glass when in the jet
spray mode.
• Hold the spray gun firmly in your hand before you start
the unit. Failure to do so could result in an injury from a
whipping spray gun. Do Not leave the spray gun
unattended while the machine is running.
• The cleaning area should have adequate slopes and
drainage to reduce the possibility of a fall due to slippery
surfaces.
• Keep water spray away from electric wiring or fatal
electric shock may result.
•Do Not by–pass any safety device on this machine.
• The muffler and engine heat up during operation and
remain hot immediately after shutting it down. Avoid
contact with a hot muffler or engine as you could be
severely burned.
• High pressure hose can develop leaks from wear, kinking,
abuse, etc. Water spraying from a leak is capable of
injecting material into skin. Inspect hose each time before
using it. Check all hoses for cuts, leaks, abrasions or
bulging of cover, or damage or movement of couplings. If
any of these conditions exist, replace hose immediately.
Never repair high pressure hose. Replace it with
another hose that exceeds maximum pressure rating of
your unit.
• The muffler and air cleaner must be installed and in good
condition before operating the pressure washer. These
components act as spark arresters if the engine backfires.
In the State of California a spark arrester is required by law
(Section 4442 of the California Public Resources Code).
Other states may have similar laws. Federal laws apply on
federal lands.
NOTE: If you equip the muffler with a spark arrester, it
must be maintained in effective working order. You can
order a spark arrester through your authorized Honda
service dealer.

Generac Portable Products 2,400 PSI High Pressure Washer
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KNOW YOUR PRESSURE WASHER
Read this owner’s manual and safety rules before operating your high pressure washer.
Compare the illustrations with your high pressure washer to familiarize yourself with the locations of various controls and
adjustments. Save this manual for future reference.
Adjustable Nozzle — Always attached to nozzle
extension. Adjustable nozzle allows you to adjust spray
pressure and spray pattern.
Air Filter — Dry type filter element limits the amount of
dirt and dust that gets in the engine.
Automatic Cool Down System — Cycles water
through pump when water reaches 140°-145°F. Warm
water will discharge from pump onto ground. This system
prevents internal pump damage.
Chemical Injection Siphon/Filter — Use to siphon
detergent or other pressure washer chemicals into the low
pressure stream.
Choke Lever — Prepares a cold engine for starting.
High Pressure Hose — Connect one end to water
pump and the other end to spray gun.
High Pressure Outlet — Connection for high pressure
hose.
Oil Fill/Dipstick — Check and fill with oil here.
Pump — Develops high pressure.
Recoil Starter — Used for starting the engine manually.
Spray Gun — Controls the application of water onto
cleaning surface with trigger device. Includes safety latch.
Throttle Control Lever — Sets engine in starting mode
for recoil starter and stops a running engine.
Water Inlet — Connection for garden hose.
High Pressure Hose
Adjustable Nozzle
Throttle Control Lever
High Pressure Outlet
Pump equipped with
Automatic Cool Down System
Spray Gun
Water Inlet
Oil Fill/Dipstick
Recoil Starter
Choke Lever
Air Filter
Chemical Injection
Siphon/Filter

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IMPORTANT: Read entire owner’s manual before you
attempt to assemble or operate your new pressure washer.
REMOVE PRESSURE
WASHER FROM
CARTON
• Remove the parts box included with pressure washer.
• Slice two corners at the end of carton from top to
bottom so the panel can be folded down flat, then
remove all packing material.
• Roll pressure washer out of carton.
Carton Contents
Items in the carton include:
• Main Unit
• Parts Box (which includes the following):
• Goggles
• Handle Assembly
• Handle Fastening Hardware (which includes):
• Carriage Bolts (2)
• Plastic Knobs (2)
• “J” Hook
• Chemical Hose Clip
• Nozzle Cleaning Kit
• High Pressure Hose
• Quick Connect
• Owner’s Manual
• Engine Manual
• Owner’s Registration Card
• Spray Gun
• Nozzle Extension
• Oil Bottle
• O-Ring Maintenance Kit
If any of the above parts are missing or damaged, call the
pressure washer helpline at 1–800–270–1408.
PREPARING PRESSURE
WASHER FOR USE
If you have any problems with the assembly of your
pressure washer or if parts are missing or damaged, call the
pressure washer helpline at 1-800-270-1408.
To prepare your pressure washer for operation, you
will need to perform these tasks:
• Fill out and send in the registration card.
• Attach the handle.
• Add oil to the engine crankcase.
• Add fuel to the fuel tank.
• Connect the high pressure hose to the spray gun and the
pump.
• Connect the water supply to the pump.
Attach Handle
NOTE: All assembly operations given in this section will
be described from the perspective of assembling the
pressure washer from the rear.
• Place the handle onto the handle supports already
connected to the main unit. Make sure the holes in the
handle align with the holes on the handle supports
(Figure 1).
NOTE: It may be necessary to move the handle supports
from side to side in order to align the handle so it will slide
over the handle supports.
Align Holes
Handle
Handle
Supports
Figure 1 — Attach Handle to Base

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• Insert the carriage bolt through the holes from the
outside of the unit and attach a plastic knob from the
inside of the unit. Tighten by hand (Figure 2).
• Insert the “J” hook into the second from the left slot in
the accessory tray (Figure 3).
• Pinch the chemical hose that comes out of a hole in the
unit’s base and slide it into the metal clip as shown in
Figure 4.
• Align the clip directly above the hole in the base and
attach it to the lower accessory tray flange (Figure 5).
Slide the chemical hose through the metal clip so that it
is tight but not kinked.
Add Engine Oil
IMPORTANT: Any attempt to crank or start the engine
before it has been properly serviced with the
recommended oil may result in an engine failure.
• Place pressure washer on a level surface.
• Refer to the engine owners manual to add recommended
oil to engine.
NOTE: Check oil often during engine break–in. Refer to
engine owner’s manual for recommendations.
Add Gasoline
DANGER! Never fill fuel tank indoors. Never fill
fuel tank when engine is running or hot. Do Not
smoke when filling fuel tank.
WARNING! Never fill fuel tank completely full.
Provide space for fuel expansion. Wipe away any
fuel spillage from engine and equipment before
starting.
•Use fresh, clean unleaded automotive gasoline and store in
approved, clean, covered containers. Use clean fill
funnels. Never use “stale” gasoline left over from last
season or gasoline stored for long periods.
• Clean area around fuel fill cap, remove cap.
• Slowly add gasoline to fuel tank. Use a funnel to prevent
spillage. Fill tank to “Fuel Level Mark” (Figure 6).
• Install fuel cap and wipe up any spilled gasoline.
Connect Hose and Water Supply to
Pump
IMPORTANT: You must attach all hoses before you start
the engine. Starting engine without all hoses connected and
water supplied will damage the pump.
Figure 2 — Secure Handle
Figure 6 — Add Gasoline to Fuel Tank
Figure 3 — Place “J” Hook on Accessory Tray
Figure 4 — Slide Chemical Hose into Metal Clip
Figure 5 — Slide Metal Clip onto Accessory Tray

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NOTE: Your pressure washer comes with a quick connect
that you can use to attach the high pressure hose to either
the pump or spray gun.
• Uncoil the high pressure hose and attach the female
quick connect to one end of the hose. Attach the male
quick connect to the high pressure fitting on the pump
(Figure 7).
• Attach the hose to the base of the spray gun (Figure 8).
Tighten by hand.
• Attach the other end of the high pressure hose to the
high pressure outlet on the pump (Figure 9). Pull down
on the collar of the quick connect, slide onto the pump
and let go of collar. Pull on hose to be sure of a tight
connection.
• Before you connect your garden hose to the water inlet,
inspect the inlet screen (Figure 10). Clean the screen if it
contains debris, replace it if it is damaged. DO NOT RUN
THE PRESSURE WASHER IF THE SCREEN IS DAMAGED.
• Run water through your garden hose for 30 seconds to
clean out any debris. Turn off water.
• Connect the garden hose to the water inlet. Tighten by
hand (Figure 10).
WARNING! There MUST be at least ten feet of
unrestricted garden hose between the pressure
washer inlet and any flow shut off device, such as a
‘Y’ shut-off connector or other convenience-type
water shut-off valve. Damage to pressure washer
resulting from disregarding this warning will not be
covered by the warranty.
• Turn ON the water and squeeze the trigger on the spray
gun to purge the pump system of air and impurities.
CAUTION! Before starting the pressure washer,
be sure you are wearing adequate eye protection.
Checklist Before Starting Engine
Review the unit’s assembly to confirm you have performed
all of the following:
• Make sure the handle is in place and secure.
• Check that oil has been added to the proper level in the
engine crankcase.
• Add the proper gasoline to fuel tank.
• Check for properly tightened hose connections.
• Check to make sure that there are no kinks, cuts, or
damage to the high pressure hose.
• Provide a proper water supply (not to exceed 140°F) at
an adequate flow.
• Be sure to read “Safety Rules” and “How To Use Your
Pressure Washer” before using the pressure washer.
Connect High Pressure
Hose Here
Figure 8 — Connect High Pressure Hose to Spray Gun
Figure 9 — Connect High Pressure Hose to Water Outlet
Inlet Screen
Figure 10 — Connect Garden Hose to Water Inlet
Figure 7 — Attach Quick Connect

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8
HOW TO USE YOUR
PRESSURE WASHER
If you have any problems operating your pressure washer,
please call the pressure washer helpline at
1-800-270-1408.
To Start Your Pressure Washer
To start your pressure washer for the first time, follow
these instructions step-by-step. This starting information
also applies if you have let the pressure washer sit idle for
at least a day.
• Place the pressure washer in an area close enough to an
outside water source capable of supplying water at a flow
rate greater than 2.4 gallons per minute.
• Check that the high pressure hose is tightly connected to
the spray gun and to the pump. See “Preparing Pressure
Washer For Use” for illustrations.
• Make sure unit is in a level position.
• Connect the garden hose to the water inlet on the
pressure washer pump. Turn ON the water.
CAUTION! Do Not run the pump without the
water supply connected and turned on. You must
follow this caution or the pump will be damaged.
• Squeeze trigger on gun until you have a steady stream of
water. This purges the pump of air and impurities.
• Attach nozzle extension to spray gun (Figure 11). Tighten
by hand.
• Position the nozzle in the low pressure mode (slide
nozzle forward) and squeeze the trigger on the spray gun
to relieve pressure caused by turning ON the water.
Water will flow out of the gun in a thin stream. Continue
to hold trigger until there is a steady stream of water
and no air remains in the system. Release the trigger.
• Engage the safety latch to the spray gun trigger
(Figure 12).
• Rotate the fuel valve lever to the “On“ position.
• Move the choke lever to the “Closed” position
(Figure 13).
NOTE: For a warm engine, be sure the choke lever is in
the “Open” position.
• Move the throttle lever to the “Fast” position, shown
on the engine as a rabbit (Figure 13). Controls are shown
in the desired operating condition.
• Place your left foot on the lower frame and grasp the
handle as shown (Figure 14). Your unit may appear
slightly different from that shown here.
• Pull the starter grip handle lightly with your right hand
until you feel some resistance, then pull briskly.
Throttle
lever in
Fast
position
Choke
lever in
Open
position
Safety Latch
Figure 13 — Throttle and Choke Controls
Figure 12 — Spray Gun with Safety Latch Engaged
Figure 11 — Connect Nozzle Extension to Spray Gun
Figure 14 — Recommended Engine Starting Posture

• Return the starter grip handle slowly. Do Not let rope
“snap back” against starter.
• When engine starts, slowly move choke lever to the
“Open” position. If engine falters, move choke lever to
the “Closed” position, then to the “Open” position.
• If engine fails to start after six pulls, move choke lever to
the “Open” position. If engine fires, but does not
continue to run, move choke lever to the “Closed”
position, then to the “Open” position.
NOTE: If the recoil starter is hard to pull, it may be necessary
to squeeze the gun trigger to relieve internal pump pressure.
How to Stop Your Pressure Washer
• Move throttle lever on engine to “Stop” position.
• Rotate the fuel valve lever to the “Off” position.
•Squeeze trigger on the spray gun to relieve
pressure in the hose.
NOTE: A small amount of water will squirt out when you
release the pressure.
How to Use Accessory Tray
The unit is equipped with an accessory tray with places to
store your nozzle extension, and slots to hold the cleaning
solution bottle and the detergent siphoning filter. There are
also two hooks on the handle to hold your spray gun and
high pressure hose.
NOTE: The extra holes in the tray are for storing a brush
and a turbo wand. The brush and turbo wand are NOT
included with your pressure washer. You can buy these
items as optional accessories.
• Place the nozzle extension through the hole on the
accessory tray as shown in Figure 15.
• Hang your chemical solution bottle on the “J” hook and
place the detergent siphoning filter in the last slot on the
left (Figure 15).
• Hang the high pressure hose on the hook attached to
the handle on the right side of the unit (Figure 15).
• Place the spray gun on the hook attached to the handle
on the left side of the unit as shown on page 4.
How to Use the Adjustable Nozzle
You now should know how to START your pressure
washer and how to STOP it. The information in this
section will tell you how to adjust the spray pattern and
apply detergent or other cleaning chemicals.
DANGER! Never adjust spray pattern when
spraying. Never put hands in front of nozzle to
adjust spray pattern.
The adjustable nozzle affixed to the nozzle extension
permits you to adjust the spray pattern and the spray
pressure, as follows:
• Slide the nozzle forward to adjust the spray to low
pressure mode (Figure 16). Slide the nozzle backward to
achieve high pressure.
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Figure 15 — Typical Accessory Tray Slide nozzle backward
for high pressure mode.
Slide nozzle forward for
low pressure mode and
detergent application.
Figure 16 - Adjusting Spray Pressure

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• Point the nozzle down towards a firm surface and press
the trigger to test the pattern (Figure 17).
• Twisting the nozzle adjusts the spray pattern from a
narrow pattern to a fan pattern (Figure 18).
• For most effective cleaning, keep the spray nozzle
between 8 to 24 inches away from cleaning surface.
• If you get the spray nozzle too close, especially using high
pressure mode, you may damage the surface being
cleaned.
•Do Not get closer than 8 inches when cleaning tires.
Applying Detergent with the
Adjustable Nozzle
WARNING! You must attach all hoses before
you start the engine. Starting the engine without all
the hoses connected and without the water turned
ON will damage the pump.
IMPORTANT: Use soaps designed specifically for
pressure washers. Household detergents could damage
the pump.
To apply detergent, follow these steps:
• Review the use of adjustable nozzles.
• Prepare detergent solution as required by the
manufacturer.
• Hang the detergent solution on the “J” hook attached to
the accessory tray, as shown in Figure 19.
• Place the small filter end of the detergent siphoning tube
into the detergent container.
CAUTION! Keep the detergent siphoning tube
from coming in contact with the hot muffler.
• Slide the adjustable nozzle forward to low pressure
mode. Detergent cannot be applied with the nozzle in
high pressure position.
• Make sure the garden hose is connected to the water
inlet. Check that the high pressure hose is connected to
the spray gun and the pump. Start the engine.
Figure 19 — Insert Filter into Container
Twist nozzle
counterclockwise for fan
spray pattern.
Twist nozzle clockwise
for narrow spray
pattern.
Figure 18 - Adjusting Spray Pattern
Figure 17 — Test the Spray Pattern

Generac Portable Products 2,400 PSI High Pressure Washer
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• Apply the detergent to a dry surface, starting at lower
portion of area to be washed and work upward, using
long, even, overlapping strokes. Do Not allow the
detergent to dry on (prevents streaking).
• Allow the detergent to “soak in” for 3-5 minutes before
washing and rinsing. Reapply as needed to prevent
surface from drying.
IMPORTANT: You must flush the chemical injection
system after each use by placing the filter into a clean
bucket of water and running the pressure washer in low
pressure for 1-2 minutes.
Pressure Washer Rinsing
WARNING! Be extremely careful if you must
use the pressure washer from a ladder, scaffolding
or any other relatively unstable location. Pressure in
a running washer builds as you climb. When you
press the trigger, the recoil from the initial spray
could cause you to fall. The high pressure spray
could also cause you to fall if you are too close to
the cleaning surface.
For Rinsing:
• Slide the nozzle backward to high pressure, press the
trigger and wait for the detergent to clear.
NOTE: You can also stop detergent from flowing by
simply removing detergent siphon tube from bottle.
• Keep the spray gun a safe distance from the area you
plan to spray.
• Apply a high pressure spray to a small area, then check
the surface for damage. If no damage is found, it is okay
to continue cleaning.
• Start at the top of the area to be rinsed, working down
with same overlapping strokes as you used for cleaning.
Automatic Cool Down System
(Thermal Relief)
If you run the engine on your pressure washer for
3-5 minutes without pressing the trigger on the spray gun,
circulating water in the pump can reach a temperature
between 140–145°F. When the water reaches this
temperature, the automatic cool down system engages and
cools the pump by discharging the warm water onto
the ground. This system prevents internal damage to the
pump.
SPECIFICATIONS
Rated Pressure . . . . . 2,400 psi
Flow Rate . . . . . . . . . . 2.2 gallons per minute (gpm)
Detergent . . . . . . . . . . Use detergent approved for
pressure washers
Water Supply Temp . Not to Exceed 140°F
Automatic Cool . . . . Will cycle when water
Down System . . . . . . . reaches 140°-145°F
Pump Oil . . . . . . . . . . . SAE 80W-90, 4.73 oz (140 ml)

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GENERAL MAINTENANCE
RECOMMENDATIONS
The pressure washer warranty does not cover items that
have been subjected to operator abuse or negligence. To
receive full value from the warranty, the operator must
maintain the high pressure washer as instructed in this
manual.
• Some adjustments will need to be made periodically to
properly maintain your high pressure washer.
• All maintenance in this manual and the engine owner’s
manual should be made at least once each season.
• Once a year you should clean or replace the spark plug,
clean or replace the air filter and check the spray gun
and adjustable nozzle extension assembly for wear. A
new spark plug and clean air filter assure proper fuel-air
mixture and help your engine run better and last longer.
Please refer to your engine owner’s manual for more
details.
BEFORE EACH USE
• Check engine oil level.
• Check water inlet screen for damage.
• Check in-line filter for damage.
• Check high pressure hose for leaks.
• Check detergent siphoning tube and filter for damage.
• Check spray gun and adjustable nozzle extension
assembly for leaks.
• Rinse out garden hose to flush out debris before
connecting to pressure washer.
PRESSURE WASHER
MAINTENANCE
Check and Clean Inlet Screen
Examine the screen on the water inlet. Clean it if the
screen is clogged or replace it if screen is damaged.
Check High Pressure Hose
The high pressure hose can develop leaks from wear,
kinking, or abuse. Inspect the hose each time before using
it. Check for cuts, leaks, abrasions or bulging of cover,
damage or movement of couplings. If any of these
conditions exist, replace the hose immediately.
WARNING! Water spraying from a leak is
capable of injecting material into skin. Inspect hose
each time before using it. Never repair a high
pressure hose. Replace it with another hose that
exceeds the maximum pressure rating of your
pressure washer.
Check Detergent Siphoning Tube
Examine the filter on the detergent tube and clean if
clogged. The tube should fit tightly on the barbed fitting.
Examine the tube for leaks or tears. Replace the filter or
tube if either is damaged.
Cleaning Detergent Siphoning Tube
If you used the detergent siphoning tube, you must flush it
with clean water before stopping the engine.
• Place the chemical injection siphon/filter in a bucket full
of clean water.
• Attach the black low pressure nozzle.
• Flush for 1-2 minutes.
• Shut off the engine.
IMPORTANT: Simply shutting OFF engine will not
release pressure in the system. When the engine has
shut down, squeeze the trigger on the spray gun to
relieve the pressure in the hose.
Check Gun and Adjustable Nozzle
Extension
Examine the hose connection to the spray gun and make
sure it is secure. Test the trigger by pressing it and making
sure it “springs back” into place when you release it. Put
the safety latch in the ON position and test the trigger. You
should not be able to press the trigger.

Generac Portable Products 2,400 PSI High Pressure Washer
13
Check In-Line Filter
Refer to Figure 20 and service the in-line filter if it
becomes clogged, as follows:
1. Detach spray gun and nozzle extension from high
pressure hose. Detach nozzle extension from spray
gun and remove o-ring and screen from nozzle
extension. Flush the screen, spray gun, and adjustable
nozzle extension with clean water to clear debris.
2. If the screen is damaged, the o-ring kit contains a
replacement in-line filter screen and an o-ring. If
undamaged, reuse screen.
3. Place the in-line filter screen into the threaded end of
the nozzle extension. Direction does not matter. Push
the screen in with the eraser end of a pencil until it
rests flat at the bottom of the opening. Take care to
not bend the screen.
4. Place the o-ring into the recess. Push the o-ring snugly
against the in-line filter screen.
5. Assemble the nozzle extension to the spray gun, as
described earlier in this manual.
Purge Pump of Air and
Contaminants
To remove air from the pump, follow these steps:
• Set up the pressure washer as described in “Preparing
Pressure Washer For Use”. Connect the water supply
and turn water on.
• Pull the trigger on the spray gun and hold.
• When the water supply is steady and constant, engage
the safety latch.
To remove contaminants from the pump, follow
these steps:
• Set up the pressure washer as described in “Preparing
Pressure Washer For Use”. Connect the water supply
and turn water on.
• Start the engine according to instructions in “To Start
Your Pressure Washer”.
• remove nozzle extension from spray gun.
• Squeeze the trigger on the spray gun and hold.
• When the water supply is steady and constant, engage
the safety latch and attach the nozzle extension.
Nozzle Maintenance
If the adjustable nozzle becomes restricted or clogged with
foreign materials, such as dirt, excessive pump pressure
may develop. A pulsing sensation occurs during use. This
generally is not a pump related problem, but rather a
clogged or partially restricted nozzle.
If the adjustable nozzle becomes clogged or partially
restricted, immediately clean the nozzle with the kit
included with your pressure washer by following these
instructions:
• Shut off the engine and turn off the water supply.
• Separate the nozzle extension from the spray gun.
• Adjust the nozzle extension to the stream position.
• Remove the nozzle from the end of the nozzle extension
(Figure 21) using a 2mm or 5/64 allen wrench (like the
one included in the kit).
Nozzle Extension
Filter Screen
O-ring
Figure 20 — Clean In-Line Filter

Generac Portable Products 2,400 PSI High Pressure Washer
14
• Use the wire included in the kit (Figure 21) or a small
paper clip to free the foreign material clogging or
restricting the nozzle.
• Remove additional debris by back flushing water through
the nozzle extension (Figure 22). Back flush between
30 to 60 seconds. Turn the nozzle extension to stream
spray and move the nozzle from low to high while
flushing.
• Reinstall the nozzle into the nozzle extension. Do Not
overtighten.
• Reconnect the water supply, turn on the water, and start
the engine.
• Reconnect the nozzle extension to the spray gun.
• Test the pressure washer by operating with nozzle in the
high and in the low positions.
O–Ring Maintenance
Through the normal operation of your pressure washer,
o–rings, which keep the connections of the hoses and spray
gun tight and leak–free, may become worn or damaged.
Provided with your pressure washer is an O–Ring
Maintenance Kit which includes replacement o-rings,
rubber washer and water inlet filter. Refer to the
instruction sheet provided in the kit to service your unit’s
o-rings. Note that not all of the parts in the kit will be used
on your unit.
To remove a worn or damaged o–ring:
• Use a small flathead screwdriver to get underneath the
o-ring and pry it off.
ENGINE MAINTENANCE
See the engine owner’s manual for instructions on how to
properly maintain the engine.
CAUTION! Avoid prolonged or repeated skin
contact with used motor oil. Used motor oil has
been shown to cause skin cancer in certain
laboratory animals. Thoroughly wash exposed areas
with soap and water. KEEP OUT OF REACH OF
CHILDREN. DON'T POLLUTE. CONSERVE
RESOURCES. RETURN USED OIL TO
COLLECTION CENTERS.
PREPARING THE UNIT
FOR STORAGE
Water should not remain in the unit for long periods of
time. Sediments or minerals can deposit on pump parts and
“freeze” pump action. If you do not plan to use the
pressure washer for more than 30 days, follow this
procedure:
1. Flush detergent siphoning tube by placing the filter into
a pail of clean water while running pressure washer in
low pressure mode (adjustable nozzle in the forward
position). Flush for one to two minutes.
2. Shut off the engine and let it cool, then remove all
hoses. Disconnect spark plug wire from spark plug.
3. Empty the pump of all pumped liquids by pulling the
recoil handle about 6 times. This should remove most
of the liquid in the pump.
NOTE: To protect the unit from freezing temperatures,
draw RV antifreeze (non-alcohol) into the pump by pouring
the solution into a 3-foot section of garden hose connected
to inlet adapter and pulling recoil handle twice.
4. Store unit in a clean, dry area.
STORING THE ENGINE
See the engine owner’s manual for instructions on how to
properly prepare the engine for storage.
Nozzle
Figure 21 — Removing and Cleaning Nozzle
Figure 22 — Backflushing the Nozzle

Generac Portable Products 2,400 PSI High Pressure Washer
15
TROUBLESHOOTING
Problem Cause Correction
Pump has following
problems: failure to
produce pressure, erratic
pressure, chattering, loss
of pressure, low water
volume.
1. Nozzle in low pressure mode.
2. Water inlet is blocked.
3. Inadequate water supply.
4. Inlet hose is kinked or leaking.
5. Clogged inlet hose strainer.
6. Water supply is over 140°F.
7. High pressure hose is blocked or
leaks.
8. Gun leaks.
9. Nozzle is obstructed.
10. Pump is faulty.
1. Pull nozzle backward for high pressure
mode.
2. Clear inlet.
3. Provide adequate water flow.
4. Straighten inlet hose, patch leak.
5. Check and clean inlet hose strainer.
6. Provide cooler water supply.
7. Clear blocks in outlet hose.
8. Replace gun.
9. Clean nozzle.
10. Contact Generac service facility.
Detergent fails to mix
with spray.
1. Detergent siphoning tube is not
submerged.
2. Chemical filter is clogged.
3. Dirty in-line filter.
4. Nozzle is in high pressure mode.
1. Insert detergent siphoning tube into
detergent.
2. Clean or replace filter/detergent
siphoning tube.
3. See “Check In-Line Filter” on page 13.
4. Push nozzle forward for low pressure
mode.
Engine runs good at no-
load but “bogs” when
load is added.
Engine speed is too slow. Move throttle control to FAST position. If
engine still “bogs down”, contact Honda
service facility.
Engine will not start; or
starts and runs rough.
1. Low oil level.
2. Dirty air cleaner.
3. Out of gasoline.
4. Stale gasoline.
5. Spark plug wire not connected to
spark plug.
6. Bad spark plug.
7. Water in gasoline.
8. Overchoking.
9. Excessively rich fuel mixture.
10. Intake valve stuck open or closed.
11. Engine has lost compression.
1. Fill crankcase to proper level.
2. Clean or replace air cleaner.
3. Fill fuel tank.
4. Drain gas tank; fill with fresh fuel.
5. Connect wire to spark plug.
6. Replace spark plug.
7. Drain gas tank; fill with fresh fuel.
8. Open choke fully and crank engine.
9. Contact Honda service facility.
10. Contact Honda service facility.
11. Contact Honda service facility.
Engine shuts down during
operation.
1. Out of gasoline.
2. Low oil level. 1. Fill fuel tank. 2. Fill crankcase to proper level.
Engine lacks power. Dirty air filter. Replace air filter.
Engine “hunts” or falters. Choke is opened too soon. Move choke to halfway position until
engine runs smoothly.

Generac Portable Products 2,400 PSI High Pressure Washer
16
EXPLODED VIEW — UNIT

Generac Portable Products 2,400 PSI High Pressure Washer
17
PARTS LIST — UNIT
Item Part # Qty. Description
1 NSP 1 ENGINE
2 187878 1 HANDLE, Lift
3 187915 1 DECAL, Warning/Decal
4 187799 2 SCREW, M4.5 x 13
5 C187859 1 BILLBOARD, Upper Front
6 B2759B 2 HOOK
7 B2516 3 CAP, Vinyl, Black
8 187889 1 DECAL, Unit
9 99583 2 NUT, 5/16" - 18
10 D187894 1 HANDLE, PW
11 30809 1 GROMMET, Chem Hose
12 187916 1 DECAL, Start Instructions
13 187952 1 DECAL, Cool Down
14 75402C 2 PUSHNUT, 1/2"
15 B4966 2 TIRE, 3" X 10" Black Mag
16 D187615 1 BASE, VSPW
17 187891 1 KIT, Handle Hardware
18 52858 2 NUT, M8 Locking Flange
19 27007 2 MOUNT, Rubber Foot
20 50190 2 WASHER, Flat, .34" x 1"
21 39288 2 HHCS, M8 x 1.25 x 55
22 87815 1 GOGGLES, Safety
23 BB3061B 1 OIL, 20oz
24 187699 1 MANUAL, Owners
25 188036 1 MANUAL, Honda Engine
26 B2163 1 KIT, Nozzle Cleaning
27 B5830 1 KIT, O-Ring Maintenance
28 B4224 1 SCREEN, Gun Inlet
29 97837 1 O-RING, Hi - Pressure
30 B3335 1 WAND, Adjustable Nozzle
31 97566 1 HANG TAG, Nozzle
32 21761 1 NOZZLE, 1.05 Yellow Replacement
33 95518 1 QC, Wand/Accessory
34 B3263 1 GUN, High Pressure
35 95519 1 QC, Wand End
36 B5642 1 HOSE, 1/4" X 25'
37 A1041 1 FILTER, Chemical Hose
38 A1040D 1 HOSE, Chemical
39 48031G 1 CLAMP, Hose Band
40 B2218 1 SEAL, Engine Donut
41 187198 3 STUD, Double Ended
42 B5685A 1 PUMP, Assembly (see pages 18-19)
43 B1880 3 NUT, M8 with Washer
44 21424 1 CONNECTOR, Garden Hose
45 187918 1 DECAL, Quick Reference
46 67989 3 NUT, M8 Standard Flange
47 48031B 1 CLAMP, Hose Band

Generac Portable Products 2,400 PSI High Pressure Washer
18
EXPLODED VIEW — PUMP

Generac Portable Products 2,400 PSI High Pressure Washer
19
PARTS LIST — PUMP
Item Part # Qty. Description
1 B2218 1 O-RING, Engine Seal
2 97962 3 SHCS, M6 - 1 x 25
3 96795 3 SLEEVE, Grommet Spacer
4 21429 6 BUSHING, Rubber Mount
5 97835 1 O-RING, Housing Seal
6 21783 1 THERMAL RELIEF, GPW-
EG
7 93680 3 SEAL, Oil Piston
8 97831 3 SPACER, Pilot
9 B2702 1 HOUSING, Piston
10 B5003 1 ADAPTER, Engine
11 B5710 1 VALVE, 1/8 npt 1/5 PSI
12 97841 3 CAP, Outlet Check Valve
13 40946 4 SHCS, M6-1.0 x 35
14 185710 0 KIT, AXIAL CAM
1 . . . . . . 1 O-RING, Engine Seal
2 . . . . . . 3 SHCS, M6 - 1 x 25
5 . . . . . . 1 O-RING, Housing Seal
15 . . . . . . 1 WASHER, Brg. 36 x 65 x 6Thk
16 . . . . . . 2 ASSY., Brg. Cage 45 x 65
17 . . . . . . 3 WASHER, Brg. 45 x 65 x 1
18 . . . . . . 1 CAM, Axial 5.6 7/8"SAE
19 185287 0 KIT, CHEM INJECT
20 . . . . . . 1 FITTING, Chem Inject
21 . . . . . . 1 BALL, Chem Inject
22 . . . . . . 1 SPRING, Chem Inject
23 . . . . . . 1 O-RING, Venturi & Seat, Black
24 . . . . . . 1 VENTURI, Chem Inject
30 . . . . . . 1 O-RING, Venturi, Yellow
25 187879 0 KIT, UNLOADER
23 . . . . . . 1 O-RING, Venturi & Seat, Black
26 . . . . . . 1 CAP, Unloader
27 . . . . . . 1 O-RING, Unloader Cap
28 . . . . . . 1 SPRING, Unloader
29 . . . . . . 1 PISTON ASSY., Unloader
31 . . . . . . 1 SEAT, Unloader
Item Part # Qty. Description
33 185712 0 KIT, CHECK VALVES
13 . . . . . . 4 SHCS, M6-1.0 x 35
34 . . . . . . 3 O-RING, Check Valve
35 . . . . . . 6 ASSY., Check Valve
47 . . . . . . 3 O-RING, Check Valve, White
36 185531 0 KIT, HEAD BRASS EG
13 . . . . . . 4 SHCS, M6-1.0 x 35
37 . . . . . . 1 HEAD, Pump
38 . . . . . . 1 PLUG, 1/8-28
48 . . . . . . 4 WASHER, M6 Flat
39 185713 0 KIT, PISTON & SPRING
1 . . . . . . 1 O-RING, Engine Seal
2 . . . . . . 3 SHCS, M6 - 1 x 25
5 . . . . . . 1 O-RING, Housing Seal
40 . . . . . . 3 RETAINER, Piston Spring
41 . . . . . . 3 PISTON, Dia. 15 x 65
42 . . . . . . 3 SPRING, Piston Return
43 185714 0 KIT, O-RING/SEAL 2300
1 . . . . . . 1 O-RING, Engine Seal
2 . . . . . . 3 SHCS, M6 - 1 x 25
5 . . . . . . 1 O-RING, Housing Seal
7 . . . . . . 3 SEAL, Oil Piston
13 . . . . . . 4 SHCS, M6-1.0 x 35
23 . . . . . . 2 O-RING, Venturi & Seat, Black
27 . . . . . . 1 O-RING, Unloader Cap
30 . . . . . . 1 O-RING, Venturi, Yellow
34 . . . . . . 3 O-RING, Check Valve
44 . . . . . . 3 SEAL, Double-Lip
45 . . . . . . 1 O-RING, High Pressure Transfer
46 . . . . . . 3 O-RING, Outlet CV Cap
47 . . . . . . 3 O-RING, Check Valve, White
Item numbers 14, 19, 25, 33, 36, 39, and 43 are service kits
and include all parts shown within the box. Certain parts
may only be available as components of a kit.

Lavadora de Alta Presión 2,400 PSI de Generac Portable Products
20
DESCRIPCIÓN DEL
EQUIPO
FELICIDADES en la compra de su lavador a alta presión
GENERAC. Este ha sido diseñado, fabricado y creado para darle
el mayor rendimiento y eficacia posible.
Este manual contiene información referente el lavador a alta
presión que funciona a 2,400 psi, a un promedio de flujo de
2.2 galones por minuto. Este sistema residencial de alto poder y
de alta calidad, posee una llanta de 10 pulgadas, una bomba
equipada con un sistema de enfriamiento, un sistema de inyección
química, un descargador ajustable, una extensión de lanzas que se
pueden conectar rápidamente, gafas de seguridad, una manguera
de alta resistencia de 25 pies y muchísimo más.
Por favor, lea y conserve este manual. Las instrucciones le
permitirán ensamblar la unidad y mantener su lavador a alta
presión funcionando adecuadamente.
Se han hechos todos los esfuerzos necesarios para asegurar que
la información que aparece en este manual es tanto exacta como
actualizada.
Sin embargo, Generac se reserva el derecho de cambiar, alterar o
de otra manera, mejorar el producto y sus respectivos
documentos en cualquier momento, sin previo aviso.
En el caso de que usted tenga un problema que no pueda resolver
fácilmente, llame la línea directa del lavador a alta presión, al
1-800-270-1408.
RESPONSABILIDADES DEL
CLIENTE
• Lea y cumpla con los reglamentos de seguridad.
• Siga el plan regular de mantenimiento, de cuidado y del uso de
su lavador a alta presión.
• Para el almacenamiento por largos períodos de tiempo, revise
"Preparando la Unidad para su Almacenamiento" en la
página 32.
INSTRUCCIONES DE
SEGURIDAD
¡PRECAUCIÓN! Cuando transporte, instale, ajuste o
haga reparaciones a su máquina lavadora de alta presión,
siempre desconecte el alambre de la bujía y colóquelo
donde No pueda entrar en contacto con la bujía.
¡PELIGRO! Los gases del sistema de escape del motor
contienen gas de monóxido de carbono MORTAL. Si este
gas peligroso se inhala en concentraciones suficientes,
puede causar pérdida de la consciencia o incluso la
muerte. Opere este equipo únicamente al aire libre, donde
exista ventilación adecuada.
¡PELIGRO! La gasolina es altamente INFLAMABLE y
sus vapores son EXPLOSIVOS. No permita que fumen,
que existan llamas abiertas, chispas o calor a su alrededor
cuando manipule gasolina. Evite regar gasolina sobre un
motor caliente. Permita que la unidad se enfríe antes de
volver a colocarle combustible. Cumpla con todas las leyes
que regulan el almacenamiento y el manejo de gasolina.
Lea este manual minuciosamente y conozca a fondo las
partes y el funcionamiento de su máquina lavadora a
presión. Conozca sus aplicaciones, sus limitaciones y los
peligros involucrados.
• Coloque esta máquina lavadora a presión en áreas alejadas de
materiales combustibles, humos o polvo combustibles.
• El equipo de alta presión está diseñado para ser utilizado
UNICAMENTE con las partes autorizadas Generac. Si
utiliza este equipo con partes que No cumplan con las
especificaciones mínimas, el usuario asume todos los riesgos y
responsabilidades.
• Algunos químicos o detergentes pueden ser nocivos si se
inhalan o ingieren, causando náusea severa, desmayos o
envenenamiento. Los elementos nocivos pueden ocasionar
daño a la propiedad o lesiones severas.
•No permita en ningún momento que NIÑOS operen la
máquina lavadora a presión.
El escape del motor de este producto contiene
elementos químicos reconocidos en el Estado de
California por producir cáncer, defectos de
nacimiento u otros daños de tipo reproductivo.
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